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annotate sr-data-logger.c @ 228:5e69d9abbbf2

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Update Hg expected frequency with value of last measurement
author Daniele Nicolodi <daniele.nicolodi@obspm.fr>
date Thu, 09 Oct 2014 15:58:32 +0200
parents 97112b45b838
children
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169
97112b45b838 Get Sr data logger parameters from configuration file. Code reorganization.
Daniele Nicolodi <daniele.nicolodi@obspm.fr>
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1 #include <ansi_c.h>
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2 #include <utility.h>
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3 #include <inifile.h>
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4 #include <tcpsupp.h>
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5
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6 #include "config.h"
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7 #include "logging.h"
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8 #include "sr-data-logger.h"
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9
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10
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11 #define CONF_SECTION_NAME "Sr data logger"
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12
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13
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14 int sr_datalogger_init(struct datalogger *dl)
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15 {
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16 int rv;
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17 char path[MAX_PATHNAME_LEN];
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18
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19 /* load configuration file */
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20 GetIniFilePath(path);
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21 IniText c = Ini_New(TRUE);
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22 Ini_ReadFromFile(c, path);
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23
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24 /* read configuration */
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25 rv = Ini_GetStringCopy(c, CONF_SECTION_NAME, "id", &(dl->id));
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26 if (rv <= 0)
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27 return -1;
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28 rv = Ini_GetStringCopy(c, CONF_SECTION_NAME, "host", &(dl->host));
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29 if (rv <= 0)
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30 return -1;
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31 rv = Ini_GetInt(c, CONF_SECTION_NAME, "port", &(dl->port));
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32 if (rv <= 0)
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33 return -1;
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34
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35 /* dispose configuration */
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36 Ini_Dispose(c);
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37
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38 return 0;
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39 }
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40
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41
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42 void sr_datalogger_dispose(struct datalogger *dl)
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43 {
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44 DisconnectFromTCPServer(dl->sock);
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45 free(dl->host);
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46 free(dl->id);
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47 }
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48
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49
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50 static int sr_datalogger_connect(struct datalogger *dl)
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51 {
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52 return ConnectToTCPServer(&(dl->sock), dl->port, dl->host, NULL, NULL, 1);
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53 }
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54
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55
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56 /* MJD functiom used by the Sr programs */
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57 static inline double utc2mjd(double utc)
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58 {
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59 return 15020.0 + utc / 86400.0;
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60 }
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61
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62
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63 int __sr_datalogger_send(struct datalogger *dl, double utc, double data)
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64 {
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65 int rv;
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66 char buffer[1024];
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67
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68 /* connect */
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69 if (! dl->sock) {
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70 rv = sr_datalogger_connect(dl);
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71 if (rv < 0)
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72 return rv;
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73 logmessage(INFO, "connected to Sr data logger %s:%d", dl->host, dl->port);
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74 }
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75
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76 snprintf(buffer, sizeof(buffer), "%s %.7f %.8f", dl->id, utc2mjd(utc), data);
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77 rv = ClientTCPWrite(dl->sock, buffer, strlen(buffer) + 1, 0);
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78 if (rv < 0) {
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79 /* reconnect and resend */
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80 dl->sock = 0;
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81 __sr_datalogger_send(dl, utc, data);
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82 }
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83
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84 return 0;
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85 }
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86